Free AI motion capture for Unity means turning a video, webcam, or phone performance into 3D character animation inside Unity — no mocap suit, no studio, and no cost — using free capture apps plus Unity’s own Humanoid retargeting. This complete guide covers face capture, body capture, getting the animation into Unity, and retargeting it onto your character. Whether you’re a solo indie dev or a small studio prototyping in Unity 6, there’s a working, no-cost pipeline here.
Mocap in Unity splits into two jobs: face and body. Unity handles the face; free AI tools handle the body.
Face capture — free, straight into Unity
Unity Face Capture is Unity’s free companion app. Paired with the free Live Capture package in the Editor, it uses an iPhone or iPad’s ARKit sensor to record facial expressions and head movement onto any rigged character in your scene, in real time. You’ll need Unity Editor 2021.3+ and both devices on the same network. One caveat to plan around: Unity has announced Live Capture support ends as of Unity 6.1, so pin a compatible version if face capture is core to your project.
For a talking-head or a stylised character, Unity Face Capture is the fastest free route from performance to animation clip.
Body capture — free AI tools that export to Unity
Unity has no built-in video-to-body mocap, so a free AI tool captures the body and you import the result as FBX.
QuickMagic runs in your browser: upload a single-camera clip and it reconstructs full-body, hand and facial motion, exporting FBX on a free credit-based plan. It’s the quickest phone-to-Unity path.
Rokoko Vision captures body motion from a webcam or video; its free tier allows single-camera capture up to about 15 seconds with FBX export, and Rokoko ships a Unity plugin. Plask offers one free capture per day (around 15 seconds), exports FBX/GLB/BVH, and also has a Unity plugin. Move One (Move.ai) gives roughly 300 free credits (about 50 seconds of single-person capture) with strong phone-based quality. Read the current limits before committing — free tiers on these tools are deliberately tight.
Whichever you pick, the body pipeline into Unity is the same: capture, export FBX, import, retarget.
Getting mocap into Unity (step by step)
- Import the FBX into your
Assetsfolder. - In the model’s Import Settings, set Rig → Animation Type → Humanoid and let Unity generate an Avatar.
- Because your character is also Humanoid, Unity’s Avatar system retargets automatically — the same clip plays on any humanoid rig with matching muscle definitions.
- Open the Animation tab to confirm the clip plays; loop it if needed.
- For fine adjustments (foot sliding, IK), add the free Animation Rigging package.
That’s a complete, free capture-to-character pipeline living inside Unity, powered by the Humanoid Avatar.
Face vs body — which free route do you need?
- Talking character or cutscene? Unity Face Capture (free, iPhone) for the face.
- Full-body movement from a video? QuickMagic, Rokoko Vision, or Move One → FBX → Humanoid.
- Both? Capture the body with a free AI tool and the face with Unity Face Capture, then combine on one character.
In short: Unity gives you the face for free, AI gives you the body for free.
Clean up floaty capture — free
Single-camera body capture tends to float or foot-slide. Cascadeur’s free tier fixes it before import: AutoPhysics adds weight and ground contact, AutoPosing repairs frames. Export the cleaned FBX, then set it to Humanoid in Unity.
FAQ
Is there free motion capture for Unity?
Yes. Unity Face Capture is free for facial mocap, and free AI tools like QuickMagic, Rokoko Vision and Plask export FBX body motion you import and retarget as Humanoid.
How do I retarget mocap in Unity?
Set the imported FBX’s Rig to Humanoid so Unity generates an Avatar; the Avatar system then retargets the clip onto any humanoid character automatically.
Do I need an iPhone for face capture in Unity?
For Unity Face Capture, yes — it uses ARKit. For body capture from video, any camera or phone works.
What’s the best free body mocap for Unity?
QuickMagic for fast browser capture, or Move One for higher-fidelity phone capture — both export FBX that retargets via the Humanoid Avatar.
Related: free AI mocap for Blender, free AI motion capture for Unreal Engine, convert video to FBX free, and the free AI mocap directory.
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